It seems that you have missed few parts of the question.
I searched that question on internet and got the complete question as follows:
Which term does not belong with the other three: lines, segments, planes, and rays?
Answer:
Line, segments and rays all are 1-dimensional quantity like they move in just one direction. While plane is a 2-dimensional quantity like it has length and breadth.
In that case term "plane" doesn't belong with the other three.
Hence final answer is "plane".